Thread-board for spinning or twisting machines.



.I. F. GALVIN.

THREAD BOARD FOR SPINNING 0R TWISTING MACHINES.

APPLICATION FILED APR. 28, I917.

Patented Nov. 2.7, 1917.

an uc "fol JOHN 1E. GALVIN, OI? PAWTUGKET, BHODE ISLAN 1D.

THREAD-BOARD FOR SPINNING OR TWISTING MACHINES. a a

Specification of Letters T atent.

Patented Nov. 2%, T911? Application filed Apr1128, 1917. Serial No.165,100.

To all whom it may concern: I

Be it known that I, JoHN F. GALVIN, a citizen of the United States, residing at Pawtucket. the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Thread-Boards for Spinning or Twisting Machines, of which the following is a specification.

This invention relates to certain new and useful improvements in a thread board for spinning or twisting machines, and it has for a. primary vaim to provide a simplified form of mounting for the thread guides.

The invention consists in a thread board to which is pivoted a thread guide having a pair of angularly related bearing faces ad acent its point of mounting, and a spring arm or device arranged to" engage either bearing face in a yielding manner for holding the thread guide in operative and inoperative positions.

The invention further resides in the features of construction hereinafter described and claimed, reference being had to the accompanying drawing wherein Fi e 1 is a transverse section through the thread board depicting the threadguide operatively disposedin solid lines and inoperatively disposed in dotted lines.

Fig. 2 is a fragmentary front elevation of the improved thread board, and

Fig.2 is a transverse section illustrating a. slightly modified form of the invention.

Referring more in detail to the drawing, the numeral 1 designates a support, such as the roller beam or dofling rail in a spinning and twisting machine, and 2 the thread board rail to which are pivoted a plurality of thread guides 3.

,The rail is preferably formed of sheet metal and consists of a flat plate that is secured to the support 1 by screws 4 in such a manner that the plate extends over said support a considerable distance to provide a, pivotal mounting for the thread guides. The forward edge portion of the plate is bent downwardly to form a front wall 5 and the lower edge of this wall is turned inwardly and under the projecting rail plate and then formed into. a knuckle to receive a pivot pin 6. The flat upper face of the rail is provided with a series of closed slots 7 extending down into the front wall 5, and in alinement with each slot 7 is an open slot 8 that extends from the front wall backwerdly through the free edge of the rail. These slots, being spaced, form an intervening abutment 9 for the respective thread guide, as will hereinafter be set forth.

A resilient metal plate 10 is secured on the support 1 beneath the rail, saidplate extending downwardly at right angles, as at 11, to receive support from the depending right angular flange 12 of said support. The spring plate is then given a return bend 13 to bring the free edge 14 into the space 15; defined by the front wall 5 and said depending back 11. This free edge 14 is divided by a series'of slots*16 into individual leaf spring portions, said slots 16 being arranged in alternation with the sets of slots 7 and 8 so as to provide an independently operable-spring leaf for each set of rail slots.

Each thread guide is preferably formed of a single length of stout wire having the usual eye 17 on its free outer end and its inner end bent at right angles to provide a bearing face 18 from which the wire is extended backwardly at an acute angle and formed with an eye or hinge knuckle 19 through which the hinge pin 6 is passed.

When the thread guide is operatively disposed, the slot 7, through. which the guide extends and operates, is practically closed against foreign matter entering therethrough% the upper face being flattened, as at 20, to lie flush with the upper surface of the rail and also to provide a bearing face on which the respective spring leaves engage when the thread guide is swung upwardly to inoperative position, as indicated at 21 in Fig. 1.

In Fig. 1 the spring plate .10 is formed integral with the rail by bending or doubling the plate upon itself, while in Fig. 3 has been illustrated a further embodiment of the present invention in which the spring plate is formed separate from the rail, such construction permitting a heavier metal being used for the rail and a lighter springy metal being used for the guide wire springs.

In operation, the spring leaf bears against the face 18 'when the guide .is in operative position, in which position the guide rests on the abutment 9 forwardly of the pivot 6 and further receives support by engaging the rear end wall of the slot 7. To swing the thread guides upwardly to inoperative position, the same are lifted to bring the bearing faces 20 opposite the spring leaves, the latter yielding during such movement. The acute will lllltl inwardly beneath the rail plate and formed with a hinge knuckle, said rail plate having a plurality of closed slots formed in its upper face and a plurality. of opened slots alined with the closed slots and opening through the free inturned edge of the plate, a spring plate secured to the rail and bent outwardly therefrom at right angles, said right angular portion being bent upon itself to have its free edge opposing the front wall, said free edge of the spring plate being divided into spring leaf sections, one for each set of rail slots, and a thread guide arranged in each closed slot and pivotally connected to the hinge knuckle of the rail, each thread guide having one end formed with a thread eye and its opposite end portion provided with angularly related bearing faces adapted to be engaged by the respective spring leaves. 2. A thread board comprising a rail hav ing a slot therein and a hinge knuckle disposed therebeneath, a thread guide having a thread eye on one end and the opposite end pivoted to the hinge knuckle and provided with angularly related bearing faces, and a yieldable lock adapted to engage the respective one of said faces for holding the thread guide in operative and inoperative positions. 3. A thread board comprising a rail having a slot in its upper face, a thread guide having an angularend passing through the rail slot and pivoted to the rail, and a spring arranged beneath the rail and yieldingly holding the guide in either; an operative or inoperative position.

4. A thread board comprising a rail having a slot in its upper face, a thread guide pivoted to the rail and operating in the slot, and a spring plate having a return bend forming a spring leaf section bearing against the guide to hold the latter fixed.

5. In a thread board, a rail, an underlying names? spring member having a right angular return bend providing a spring leaf, and a thread guide pivoted to the rail and engaged by the spring leaf in a yielding manner.

either face of the guide.

7. In a thread board, a rail having a flat upper face provided with a downturned forward edge that is turned inwardly and formed with a hinge knuckle underlying the upper face of the rail, a spring plate underlying the rail and bent downwardly and then upwardly to oppose the hinge knuckle, and a thread guide pivoted to the hinge knuckle and having flat bearing faces adapted to be engaged by the free edge of the spring plate.

8. In a thread board, a rail having a flat upper face and turned downwardly at its forward edge and formed with a hinge knuckle, said upper face having a slot therein, a thread guide connected to the knuckle and passing through the rail slot, said guide having a pair of angularly related bearing faces, and a spring plate underlying the rail and bent downwardly and then upwardly to provide a spring leaf opposing the bearing faces of the thread guide for engaging the same.

9. In a thread board, a rail having a flat upper face formed with a plurality of slots and an underlying bearing beneath each slot,

tion being divided into spring leaf sections,

one for each thread guide, for engaging the latter and holding the same in operative position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN F. GALVIN. Witnesses:

ADA E. HAGERTY, J. A. MILLER. 

